Twin Rivers, UCMP A3683 (Oligocene of the United States)
Where: Clallam County, Washington (48.2° N, 123.9° W: paleocoordinates 47.8° N, 115.0° W)
• coordinate based on nearby landmark
When: Twin Rivers Formation, Late/Upper Oligocene (28.4 - 23.0 Ma)
Environment/lithology: marine; lithified shale
Size class: macrofossils
Primary reference: J. W. Durham. 1944. Megafaunal zones of the Oligocene of northwestern Washington. University of California Publications in Geological Sciences 27:101 -212 [P. Holroyd/E. Orzechowski]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 208153: authorized by Mark Uhen, entered by Mark Uhen on 22.03.2020
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Gastropoda | |
Oxystele dorni n. sp.
Oxystele dorni n. sp. Durham 1944 top snail | |
| Bivalvia | |
? Yoldia blakeleyensis n. sp.
? Yoldia blakeleyensis n. sp. Durham 1944 clam | |
"Acila gettysburgensis" = Acila (Acila) gettysburgensis
"Acila gettysburgensis" = Acila (Acila) gettysburgensis Regan 1909 divaricate nutclam | |